Repositories holding original manuscripts and artifacts from the Lewis and Clark Expedition:
The American Philosophical Society, Philadelphia, Pennsylvania
The journals of Lewis, Clark, and Ordway
The Beinecke Rare Book and Manuscript Library, Yale University
William Clark’s field notes
The Academy of Natural Sciences, Philadelphia, Pennsylvania
Lewis and Clark’s plant specimens
The Newberry Library, Chicago, Illinois
Joseph Whitehouse’s journals
The Wisconsin Historical Society, Madison, Wisconsin
Charles Floyd’s journal
Other Useful Lewis and Clark Websites
Corps of Discovery Online Atlas
http://lcatlas.lclark.edu
Discovering Lewis and Clark
http://www.lewis-clark.org
The Lewis and Clark Trail Heritage Foundation
http://www.lewisandclark.org
The Lewis and Clark Historic Trail, National Park Service
http://www.nps.gov/lecl/index.htm